In 2020, LEGO released 23 Duplo sets across 3 subthemes. Subthemes for that year included Batman, Disney Princess, and Marvel Super Hero Adventures. For that year, the total price of all retail sets cost $704, today those sets are valued around $1,323, a growth of 88%.
Most valuable 2020 LEGO Duplo set
10933 Tower Crane & Construction $209.63
Highest growth 2020 Duplo set
10922 Ariel's Undersea Castle +333.68%
Largest 2020 LEGO Duplo set
10934 Creative Animals 175 pieces
Most owned 2020 Duplo set
10931 Truck & Tracked Excavator
23 sets

10909 Heart Box

Theme Duplo
Year 2020
Pieces 80
Availability Retired
10909 LEGO Duplo Heart Box
Retail $19.99
Value $24.96
Growth  +24.9%
Annual growth 5.3%

10913 Brick Box

Theme Duplo
Year 2020
Pieces / Duplo figures 65 / 2
Availability Retired
10913 LEGO Duplo Brick Box
Retail $29.99
Value $30.37
Growth  +1.3%

10914 Deluxe Brick Box

Theme Duplo
Year 2020
Pieces / Duplo figures 85 / 2
Availability Retired
10914 LEGO Duplo Deluxe Brick Box
Retail $49.99
Value $52.49
Growth  +5.0%
Annual growth 1.4%

10915 Alphabet Truck

Theme Duplo
Year 2020
Pieces / Duplo figures 36 / 2
Availability Retired
10915 LEGO Duplo Alphabet Truck
Retail $24.99
Value $30.04
Growth  +20.2%
Annual growth 6.7%

10917 Fire Truck

Theme Duplo
Year 2020
Pieces 6
Availability Retired
10917 LEGO Duplo Fire Truck
Retail $6.99
Value $18.86
Growth  +169.8%
Annual growth 12.5%

10918 Tow Truck

Theme Duplo
Year 2020
Pieces 7
Availability Retired
10918 LEGO Duplo Tow Truck
Retail $6.99
Value $15.75
Growth  +125.3%
Annual growth 10.9%

10919 Batcave

Theme / Subtheme Duplo / Batman
Year 2020
Pieces / Duplo figures 33 / 3
Availability Retired
10919 LEGO Duplo Batman Batcave
Retail $29.99
Value $52.67
Growth  +75.6%
Annual growth 8.8%

10920 Elsa and Olaf's Tea Party

Theme Duplo
Year 2020
Pieces / Duplo figures 17 / 2
Availability Retired
10920 LEGO Duplo Elsa and Olaf's Tea Party
Retail $19.99
Value $43.40
Growth  +117.1%
Annual growth 17.8%

10921 Super Heroes Lab

Theme / Subtheme Duplo / Marvel Super Hero Adventures
Year 2020
Pieces / Duplo figures 30 / 3
Availability Retired
10921 LEGO Duplo Marvel Super Hero Adventures Super Heroes Lab
Retail $29.99
Value $54.99
Growth  +83.4%
Annual growth 10.5%

10922 Ariel's Undersea Castle

Theme / Subtheme Duplo / Disney Princess
Year 2020
Pieces / Duplo figures 35 / 1
Availability Retired
10922 LEGO Duplo Disney Princess Ariel's Undersea Castle
Retail $29.99
Value $130.06
Growth  +333.7%
Annual growth 24.2%

10924 Lightning McQueen's Race Day

Theme Duplo
Year 2020
Pieces / Duplo figures 42 / 2
Availability Retired
10924 LEGO Duplo Lightning McQueen's Race Day
Retail $29.99
Value $87.65
Growth  +192.3%
Annual growth 17.4%

10925 Playroom

Theme Duplo
Year 2020
Pieces / Duplo figures 17 / 2
Availability Retired
10925 LEGO Duplo Playroom
Retail $14.99
Value $32.99
Growth  +120.1%
Annual growth 10.5%

10926 Bedroom

Theme Duplo
Year 2020
Pieces / Duplo figures 16 / 2
Availability Retired
10926 LEGO Duplo Bedroom
Retail $14.99
Value $31.85
Growth  +112.5%
Annual growth 11.6%

10927 Pizza Stand

Theme Duplo
Year 2020
Pieces / Duplo figures 18 / 1
Availability Retired
10927 LEGO Duplo Pizza Stand
Retail $9.99
Value $17.76
Growth  +77.8%
Annual growth 9.8%

10928 Bakery

Theme Duplo
Year 2020
Pieces / Duplo figures 46 / 2
Availability Retired
10928 LEGO Duplo Bakery
Retail $34.99
Value $44.93
Growth  +28.4%
Annual growth 5.4%

10929 Modular Playhouse

Theme Duplo
Year 2020
Pieces / Duplo figures 129 / 3
Availability Retired
10929 LEGO Duplo Modular Playhouse
Retail $59.99
Value $133.99
Growth  +123.4%
Annual growth 16.9%

10930 Bulldozer

Theme Duplo
Year 2020
Pieces / Duplo figures 10 / 1
Availability Retired
10930 LEGO Duplo Bulldozer
Retail $9.99
Value $19.86
Growth  +98.8%
Annual growth 8.0%

10931 Truck & Tracked Excavator

Theme Duplo
Year 2020
Pieces / Duplo figures 20 / 2
Availability Retail
10931 LEGO Duplo Truck & Tracked Excavator
Retail $19.99
Available at retail

10932 Wrecking Ball Demolition

Theme Duplo
Year 2020
Pieces / Duplo figures 56 / 3
Availability Retired
10932 LEGO Duplo Wrecking Ball Demolition
Retail $59.99
Value $197.14
Growth  +228.6%
Annual growth 19.2%

10933 Tower Crane & Construction

Theme Duplo
Year 2020
Pieces / Duplo figures 123 / 5
Availability Retired
10933 LEGO Duplo Tower Crane & Construction
Retail $129.99
Value $209.63
Growth  +61.3%
Annual growth 9.3%

10934 Creative Animals

Theme Duplo
Year 2020
Pieces 175
Availability Retired
10934 LEGO Duplo Creative Animals
Retail $59.99
Value $56.16

30329 My First Giraffe

Theme Duplo
Year 2020
Pieces 5
Availability Retired
30329 LEGO Duplo My First Giraffe
Retail $4.99
Value $6.12
Growth  +22.6%
Annual growth 4.2%

30330 Birthday Cake

Theme Duplo
Year 2020
Pieces 9
Availability Retired
30330 LEGO Duplo Birthday Cake
Retail $4.99
Value $10.99
Growth  +120.2%
Annual growth 7.9%